Re: Time to measure ECI2002 with a Spectroscan?
Re: Time to measure ECI2002 with a Spectroscan?
- Subject: Re: Time to measure ECI2002 with a Spectroscan?
- From: Graeme Gill <email@hidden>
- Date: Thu, 01 Dec 2005 11:39:40 +1100
Marco Ugolini wrote:
Compare that to the 75 minutes or longer that the Spectroscan takes for the
1,780 patches in the ECI2002, and you can do the same job 8 to 10 times over
with the iO in the amount of time it takes the Spectroscan to go through the
whole set once!
That is, unless there is something I am missing in this picture...
Right, so rather than being 15 times faster, as it first appears, it is
probably about 7 times faster (hence "not quite so spectacular", as in
"half as spectacular").
The need for detecting patch transitions is a bit unfortunate though.
It limits the chart layout quite a bit. For some combinations of
test values it may be possible to arrange the chart to naturally
have contrasting patch values adjacent, but my experience with doing
this for strip readers (ie. Xrite DTP51 & DTP41) is that you run out
of options as the test set gets large, and if the black is fully explored
for CMYK devices (because lots of test values with black in them are
dark near neutrals).
It also eliminates some of the other tricks that work well on the
SpectroScan, such as a hexagonal patch layout.
At the end of the day the much higher speed of the i0 may well outweigh
such drawbacks.
Graeme Gill.
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